CDH2D09 datasheet(9/44 Pages) MAXIM

9 / 44 page

PMIC with Integrated Charger and

Smart Power Selector for Handheld Devices

_______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Skip Mode Transition Current

(Note 10)

n-Channel Zero-Crossing

Threshold

Maximum Duty Cycle

100

Minimum Duty Cycle

PWM mode

12.5

Internal Oscillator Frequency

1.8

2.0

2.2

MHz

Internal Discharge Resistance in

Shutdown

EN = low, resistance from LX1 to PG1

0.5

1.0

2.0

REG2—SYNCHRONOUS STEP-DOWN CONVERTER

Input Voltage

PV2 supplied from SYS

VSYS

Maximum Output Current

L = 4.7µH, RL = 0.13

Ω (Note 7)

425

FB2 Voltage

(Note 8)

0.997

1.012

1.028

Adjustable Output Voltage Range

VSYS

TA = +25°C

-50

-5

+50

FB2 Leakage Current

VFB2 = 1.012V

TA = +85°C

-50

Load Regulation

PWM mode

4.4

%/A

Line Regulation

PWM mode (Note 9)

%/D

p-Channel On-Resistance

VPV2 = 4V, ILX2 = 180mA

200

400

n-Channel On-Resistance

VPV2 = 4V, ILX2 = 180mA

150

265

p-Channel Current-Limit

Threshold

0.555

0.615

0.675

Skip Mode Transition Current

(Note 10)

n-Channel Zero-Crossing

Threshold

Maximum Duty Cycle

100

Minimum Duty Cycle

PWM mode

12.5

Internal Oscillator Frequency

1.8

2.0

2.2

MHz

Internal Discharge Resistance in

Shutdown

EN = low, resistance from LX2 to PG2

0.5

1.0

2.0

REG3—SYNCHRONOUS STEP-DOWN CONVERTER

Input Voltage

PV3 supplied from SYS

VSYS

Maximum Output Current

L = 4.7µH, RL = 0.13

Ω (Note 7)

425

FB3 Voltage

(Note 8)

0.997

1.012

1.028

Adjustable Output Voltage Range

VSYS

TA = +25°C

-50

-5

+50

FB3 Leakage Current

VFB2 = 1.012V

TA = +85°C

-50

Load Regulation

PWM mode

4.4

%/A

ELECTRICAL CHARACTERISTICS (continued)

(DC, USB, BVSET, UOK, DOK, LX_ unconnected; VTHM = VL/2, VPG_ = VAGND = 0V, VBAT = 4V, CEN = low, USUS = low, EN = high,

VPEN1 = VPEN2 = 3.3V, VPWM = 0V, COUT4 = 1µF, COUT5 = 1µF, CSYS = 10µF, PV1 = PV2 = PV3 = PV4 = PV5 = SYS, RDISET = 3kΩ,

RCISET = 3kΩ, CVL = 0.1µF, CCT = 0.15µF, CBP = 0.01µF, VFB1 = 1.1V, VFB2 = 1.1V, VFB3 = 1.1V, TA = -40°C to +85°C, unless other-

wise noted.) (Note 2)

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